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tert-Butanol → cis-(+/-)-Benzyl 3,5-bis(tert-butoxycarbonylamino)piperidine-1-carboxylate

HRID 69912
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 69912
[CH2:1]([O:8][C:9]([N:11]1[CH2:16][C@H:15]([NH:17][C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:14][C@H:13](C(O)=O)[CH2:12]1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C1C=CC(P(N=[N+]=[N-])(C2C=CC=CC=2)=[O:35])=CC=1.CC[N:47]([CH:51](C)C)C(C)C.[CH3:54][C:55]([OH:58])([CH3:57])[CH3:56]>>[C:55]([O:58][C:51]([NH:47][C@H:13]1[CH2:14][C@@H:15]([NH:17][C:18]([O:20][C:21]([CH3:23])([CH3:22])[CH3:24])=[O:19])[CH2:16][N:11]([C:9]([O:8][CH2:1][C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)=[O:10])[CH2:12]1)=[O:35])([CH3:57])([CH3:56])[CH3:54]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

5

Edukt 4

HCID 6386tert-ButanolHCID 81531DiisopropylethylamineHCID 199401P,P-Diphenylphosphinic azideHCID 86656441HCID 86656441, Verbindung

Produkt 1

HCID 58865133cis-(+/-)-Benzyl 3,5-bis(tert-butoxycarbonylamino)piperidine-1-carboxylateAusbeute 23 %

Versuchsvorschrift

To a solution of cis-(+/−)-1-(benzyloxycarbonyl)-5-(tert-butoxycarbonylamino) piperidine-3-carboxylic acid (1.2 g, 3.17 mmol), DPPA (Diphenylphosphoryl azide, 1.04 g, 3.81 mmol) and DIEA (1.1 mL, 6.35 mmol) in t-BuOH (10 mL) was heated to 90° C. over night. The solvent was removed under reduced pressure. To the crude was added EtOAc (300 mL), the organic layer was washed with saturated NaHCO3 (150 mL) and brine, dried and filtered, and concentrated to give the crude. The crude material was further purified by silica gel chromatography to yielding cis-(+/−)-benzyl 3,5-bis(tert-butoxycarbonylamino)piperidine-1-carboxylate, (23%). LCMS (m/z): 350(minus one Boc(MH+); LC Rt=4.40 min.

Aufarbeitung

  1. customThe solvent was removed under reduced pressure
  2. additionTo the crude was added EtOAc (300 mL)
  3. washthe organic layer was washed with saturated NaHCO3 (150 mL) and brine
  4. customdried
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customto give the crude
  8. customThe crude material was further purified by silica gel chromatography

Quellen und Nachweise

ORD-Eintrag
ord-7977253b7eaf4da18275906227078f2e
Quelldatensatz
uspto-grants-2014_09
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08822497B2

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